Abstract Body (Do not enter title and authors here): Introduction:
Whereas low testosterone levels have been associated with poor cardiovascular outcomes and testosterone replacement therapy (TRT) in middle-to-older age adults with cardiovascular risk factors is considered safe, there is little data on the adverse cardiovascular effects of TRT in young adults.

Case Report:
A 38-year-old male with a past medical history of hypogonadism, recently started on intramuscular testosterone cypionate injections, presented to the hospital with altered mentation. Laboratory workup was remarkable for hemoglobin of 19 g/dL. Computed tomography (CT) angiogram of the head demonstrated a left middle cerebral artery infarct with a filling defect, requiring mechanical thrombectomy. A transthoracic echocardiogram (TTE) was done which revealed a dilated left ventricle (LV) with severely reduced LV systolic function, EF 20%, and global hypokinesis. There was no LV thrombus or evidence of a patent foramen ovale with contrast saline injection. He did not have any episodes of atrial fibrillation on telemetry monitoring. His hospital course was further complicated by an inferolateral ST elevation myocardial infarction (STEMI) due to distal left anterior descending (LAD) artery occlusion. He underwent drug-eluting stent placement and was started on dual antiplatelet therapy. Repeat TTE demonstrated new apical akinesis along with an LV apical thrombus of 1.1 x 0.8 cm. CT abdomen/pelvis with contrast demonstrated left renal and right iliofemoral thrombosis and the patient was also started on systemic anticoagulation.

Discussion:
Data suggests that physiologic levels of testosterone exhibit cardioprotective effects and low testosterone levels are associated with increased cardiovascular mortality. However, studies have also shown that testosterone use is associated with an increased risk of thrombosis and coronary artery disease. Additionally, testosterone use has been associated with myocardial apoptosis and adverse cardiac remodeling from dysregulation of androgenic receptors, which results in dilated cardiomyopathy. There is an ongoing debate on the safety of TRT, however, studies on TRT have largely included the middle and older male population and there is little data on younger patients. Herein, we demonstrate a case of TRT in a patient with several cardiovascular risk factors, who developed evidence of possible TRT-associated cardiomyopathy in addition to hypercoagulability.